In article <mailman.2807.1384725251.18130.python-l...@python.org>,
Tamer Higazi <th9...@googlemail.com> wrote:
> Hi people!
>
> Assume we have 2 methods, one called Fire and the other __DoSomething.
>
> I want the param which is a string to be converted, that I can fire
> directly a method. Is it somehow possible in python, instead of writing
> if else statements ???!
>
>
>
> Tamer
>
>
> class(object):
> def Fire(self,param)
> #possible ?!
> self.__param():
>
>
> def _DoSomething(self):
> print 'I did it!'
I'm not sure why you'd want to do this, but it's certainly possible (as,
I imagine it would be, in any language that has introspection). You can
use getattr() to look up an attribute by name. Here's a little program
which demonstrates this:
class C:
def Fire(self, param):
print "I'm Fire"
try:
f = getattr(self, param)
f()
except AttributeError as ex:
print "==> %s" % ex
def _DoSomething(self):
print "I'm _DoSomething"
if __name__ == '__main__':
c = C()
c.Fire("_DoSomething")
c.Fire("blah")
$ python s.py
I'm Fire
I'm _DoSomething
I'm Fire
==> C instance has no attribute 'blah'
One thing to be aware of is that a single underscore in front of a name
is fine, but a double underscore (i.e. "__DoSomething") invokes a little
bit of Python Magic and will give you unexpected results.
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